Company lists · Data refreshed September 2026

Top 25 Nonprofit cybersecurity services based in the United States

Name: Nonprofit cybersecurity services based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 3,962 companies tracked

RevenueBase identified 3,962 nonprofit cybersecurity services headquartered in the United States as of September 2026 and tracks 45,373 professional contacts across them, including 15,475 with verified work emails. New York is the largest hub.

This list covers nonprofit cybersecurity services headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 29, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 29, 2026 86% judged on-target in blind review

3,962Companies

45,373Contacts tracked

15,475Verified emails

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The 25 largest nonprofit cybersecurity services based in the United States

Ranked by team size

Top 25 of 3,962 nonprofit cybersecurity services based in the United States, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to nonprofit cybersecurity services: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Bugcrowd	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 29, 2026	n/a	3,649 contacts →
	Indirect evidence “We are a crowdsourced security company that safeguards organizations' assets from sophisticated threat actors before they can strike-by uniting our customers with trusted hackers…” Source: RevenueBase Database · checked Sep 29, 2026
2	Sans Institute	Partial evidence	Rockville, MD, United StatesHQ checked Sep 29, 2026	n/a	1,886 contacts →
	Partial evidence “SANS is the most trusted and by far the largest source for information and cybersecurity training and certification in the world.” Source: RevenueBase Database · checked Sep 29, 2026
3	Guidepoint Security	Partial evidence	Reston, VA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,232 contacts →
	Partial evidence “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: RevenueBase Database · checked Sep 29, 2026
4	Coalfire	Partial evidence	Chicago, IL, United StatesHQ checked Sep 29, 2026	1,001-5,000	947 contacts →
	Partial evidence “Coalfire is the premier Cybersecurity and Compliance Services leader for the tech, healthcare, and finance industries.(This page is maintained by Marketing.” Source: RevenueBase Database · checked Sep 29, 2026
5	Offsec	Partial evidence	New York, NY, United StatesHQ checked Sep 29, 2026	201-500	879 contacts →
	Partial evidence “Empowering the world to fight cyber threats with indispensable cybersecurity skills and resources.” Source: RevenueBase Database · checked Sep 29, 2026
6	Trustwave, A Levelblue Company	Partial evidence	Chicago, IL, United StatesHQ checked Sep 29, 2026	501-1,000	874 contacts →
	Partial evidence “Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Source: RevenueBase Database · checked Sep 29, 2026
7	Application Specialist Kompany ASK	Indirect evidence	Lansing, MI, United StatesHQ checked Sep 29, 2026	n/a	785 contacts →
	Indirect evidence “ASK is now Convergence Networks!” Source: RevenueBase Database · checked Sep 29, 2026
8	Telos Corporation	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 29, 2026	501-1,000	629 contacts →
	Indirect evidence “Telos Corporation (NASDAQ: TLS) empowers and protects the world’s most security-conscious organizations with efficient, adaptable, and secure solutions that safeguard people…” Source: RevenueBase Database · checked Sep 29, 2026
9	Ultraviolet Cyber	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 29, 2026	501-1,000	523 contacts →
	Indirect evidence “UltraViolet Cyber is the only security operations partner that unifies red, blue, and purple team capabilities into one integrated program, finding what's vulnerable, stopping…” Source: RevenueBase Database · checked Sep 29, 2026
10	Palo Alto Networks Unit 42	Indirect evidence	Santa Clara, CA, United StatesHQ checked Sep 29, 2026	5,001-10,000	441 contacts →
	Indirect evidence “Palo Alto Networks Unit 42 brings together world-renowned threat researchers with an elite team of incident responders and security consultants to create an intelligence-driven…” Source: RevenueBase Database · checked Sep 29, 2026
11	Cyber Security Forum Initiative	Indirect evidence	Omaha, NE, United StatesHQ checked Sep 29, 2026	51-200	417 contacts →
	Indirect evidence “The Cyber Security Forum Initiative (CSFI) is a non-profit organization headquartered in Omaha, NE and in Washington DC with a mission "to provide Cyber Warfare awareness…” Source: RevenueBase Database · checked Sep 29, 2026
12	Bishop FOX	Indirect evidence	Tempe, AZ, United StatesHQ checked Sep 29, 2026	201-500	344 contacts →
	Indirect evidence “Bishop Fox is recognized as the leading authority in offensive security, providing solutions ranging from continuous penetration testing, red teaming, and attack surface…” Source: RevenueBase Database · checked Sep 29, 2026
13	Security Risk Advisors	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 29, 2026	201-500	315 contacts →
	Partial evidence “We deliver cybersecurity consulting, 24x7 operations and SaaS to leading companies in the Financial Services, Healthcare, Pharmaceuticals, Technology and Retail industries.” Source: RevenueBase Database · checked Sep 29, 2026
14	Prescient Security	Partial evidence	Nashville, TN, United StatesHQ checked Sep 29, 2026	201-500	272 contacts →
	Partial evidence “Prescient Security is a global cybersecurity and compliance firm delivering risk-based audits, advanced penetration testing, and end-to-end framework support.” Source: RevenueBase Database · checked Sep 29, 2026
15	Millennium Corporation	Partial evidence	Arlington, VA, United StatesHQ checked Sep 29, 2026	201-500	265 contacts →
	Partial evidence “For nearly two decades, Millennium Corporation has been operating on the leading edge of cybersecurity.” Source: RevenueBase Database · checked Sep 29, 2026
16	Baxter Clewis Cybersecurity	Partial evidence	Cedar Hill, TX, United StatesHQ checked Sep 29, 2026	201-500	255 contacts →
	Partial evidence “Baxter Clewis Cybersecurity, we bring to the table a unique set of experiences that allow us to best serve your cybersecurity needs.” Source: RevenueBase Database · checked Sep 29, 2026
17	Lumifi	Indirect evidence	Scottsdale, AZ, United StatesHQ checked Sep 29, 2026	51-200	249 contacts →
	Indirect evidence “Lumifi Cyber helps organizations illuminate their cyber defense with continuous protection across the full security lifecycle.” Source: RevenueBase Database · checked Sep 29, 2026
18	Sawdey Solution Services	Indirect evidence	Beavercreek, OH, United StatesHQ checked Sep 29, 2026	201-500	234 contacts →
	Indirect evidence “For over 20 years, Sawdey Solutions Services has provided both Government and commercial clients with innovative cross-disciplined professional services that aim not only to…” Source: RevenueBase Database · checked Sep 29, 2026
19	Loginsoft	Partial evidence	Chantilly, VA, United StatesHQ checked Sep 29, 2026	201-500	220 contacts →
	Partial evidence “For over 20 years, leading companies in Telecom, Cybersecurity, Healthcare, Banking, New Media, and more have come to rely on Loginsoft as a trusted resource for technology talent.” Source: RevenueBase Database · checked Sep 29, 2026
20	TCM Security	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 29, 2026	n/a	206 contacts →
	Partial evidence “A veteran-owned cybersecurity company focused on penetration testing, security training, and compliance.” Source: RevenueBase Database · checked Sep 29, 2026
21	Mindpoint Group, A Quantum SKY Company	Partial evidence	Reston, VA, United StatesHQ checked Sep 29, 2026	1,001-5,000	204 contacts →
	Partial evidence “MindPoint Group, a Quantum Sky company, is a cybersecurity specialist trusted by U.S.” Source: RevenueBase Database · checked Sep 29, 2026
22	Tevora	Partial evidence	Irvine, CA, United StatesHQ checked Sep 29, 2026	201-500	199 contacts →
	Partial evidence “Founded in 2003, Tevora is a specialized management consultancy focused on cybersecurity, risk, and compliance services.” Source: RevenueBase Database · checked Sep 29, 2026
23	Webroot	Indirect evidence	Broomfield, CO, United StatesHQ checked Sep 29, 2026	501-1,000	199 contacts →
	Indirect evidence “Webroot, an OpenText company, was the first to harness the cloud and artificial intelligence to stop zero-day threats in real time.” Source: RevenueBase Database · checked Sep 29, 2026
24	Safeaeon INC	Partial evidence	Pleasanton, CA, United StatesHQ checked Sep 29, 2026	51-200	196 contacts →
	Partial evidence “SafeAeon leads the industry as a top-tier Cybersecurity-as-a-Service provider, delivering 24x7 premium Managed Security Services with AI-powered and human-driven 24x7 SOC…” Source: RevenueBase Database · checked Sep 29, 2026
25	Deepseas	Indirect evidence	Globally Distributed, United StatesHQ checked Sep 29, 2026	201-500	182 contacts →
	Indirect evidence “With 30 years of experience in cyber defense, DeepSeas is trusted by nearly clients around the world, including Fortune 100 enterprises and mid-market organizations, municipality…” Source: RevenueBase Database · checked Sep 29, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: nonprofit cybersecurity services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names nonprofit cybersecurity services.
Partial evidence: Its own public description names part of nonprofit cybersecurity services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name nonprofit cybersecurity services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 3,962 nonprofit cybersecurity services based in the United States

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Nonprofit cybersecurity services based in the United States at a glance

As of Sep 29, 2026

34.1%Verified-email coverage

11.5Average contacts per company

1-10Median size (employees)

2.6%Largest-city concentration · New York

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

2,531

11-50

1,069

51-200

276

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 3,962 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among nonprofit cybersecurity services, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “nonprofit cybersecurity services”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names nonprofit cybersecurity services), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among nonprofit cybersecurity services, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 15,475 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 29, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Nonprofit cybersecurity services by metro

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names nonprofit cybersecurity services, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many nonprofit cybersecurity services are there based in the United States?

RevenueBase identified 3,962 nonprofit cybersecurity services headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Bugcrowd, headquartered in San Francisco, tops this list with the largest team on record.

Which city has the most nonprofit cybersecurity services?

New York leads with 104 headquartered companies, followed by Atlanta (82) and Washington (82).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 15,475 verified decision-maker contacts tracked across these 3,962 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.